Distorted Sims/ Missing parts

Ever since I downloaded the High school Year s Expansion pack my sims are getting distorted after traveling. I don’t know if it’s related to the pack but the bug mostly occurs after I get a teen to go to high school. 

once it starts affection one sim it starts affecting every other world as well. Sometimes parts of their faces are dragged to the floor with strings and they look so weird. Missing legs and arms or their upper half are the most common. That and their lips getting dragged down.

now this isn’t the first time it happened. It keeps happing and I’ve even contacted ea in the past. Rebooted my laptop, cleared my cache, deleted and redownloaded the game. I’ve tried everything and every week or two that I get a new teen sim to high school it happens again.

for obvious reason I can’t just not play with the expansion pack cause I paid for it. I hope we can figure it out and get some help cause it’s frustrating at times